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| author | Michael Brown | 2011-06-29 15:49:18 +0200 |
|---|---|---|
| committer | Michael Brown | 2011-06-29 15:52:30 +0200 |
| commit | 1b8984eb5da23e58f275478474dd6ab8d7a785ea (patch) | |
| tree | fb90e94dfb4511a62937793177ee53cc46573548 /src | |
| parent | [build] Avoid using -ffunction-sections on some older versions of gcc (diff) | |
| download | ipxe-1b8984eb5da23e58f275478474dd6ab8d7a785ea.tar.gz ipxe-1b8984eb5da23e58f275478474dd6ab8d7a785ea.tar.xz ipxe-1b8984eb5da23e58f275478474dd6ab8d7a785ea.zip | |
[iscsi] Avoid duplicate calls to iscsi_tx_done()
The iSCSI TX process can now be woken up by the TCP socket via
xfer_window_changed(), so it is no longer valid to assume that
iscsi_tx_step() can be called in state ISCSI_TX_IDLE only immediately
after completing a transmission.
Fix by calling iscsi_tx_done() only upon a transition into state
ISCSI_TX_IDLE.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src')
| -rw-r--r-- | src/net/tcp/iscsi.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/src/net/tcp/iscsi.c b/src/net/tcp/iscsi.c index 87815599..8beeb877 100644 --- a/src/net/tcp/iscsi.c +++ b/src/net/tcp/iscsi.c @@ -1333,8 +1333,7 @@ static void iscsi_tx_resume ( struct iscsi_session *iscsi ) { static void iscsi_start_tx ( struct iscsi_session *iscsi ) { assert ( iscsi->tx_state == ISCSI_TX_IDLE ); - assert ( ! process_running ( &iscsi->process ) ); - + /* Initialise TX BHS */ memset ( &iscsi->tx_bhs, 0, sizeof ( iscsi->tx_bhs ) ); @@ -1476,8 +1475,8 @@ static void iscsi_tx_step ( struct iscsi_session *iscsi ) { next_state = ISCSI_TX_IDLE; break; case ISCSI_TX_IDLE: - /* Stop processing */ - iscsi_tx_done ( iscsi ); + /* Nothing to do; pause processing */ + iscsi_tx_pause ( iscsi ); return; default: assert ( 0 ); @@ -1504,6 +1503,12 @@ static void iscsi_tx_step ( struct iscsi_session *iscsi ) { /* Move to next state */ iscsi->tx_state = next_state; + + /* If we have moved to the idle state, mark + * transmission as complete + */ + if ( iscsi->tx_state == ISCSI_TX_IDLE ) + iscsi_tx_done ( iscsi ); } } |